when your are recieving some sort of sexual stimulation from a girl, right before you cum, you take the tip of your penis and place it right at her nostril.
"Did you hear? Travis gave the german foreign exchange student a runny nose"
by Travislam November 04, 2004
while having sex, just before the climax of ejaculation stick your "head" in or just around the nostril of the girl and jizz in it, until it oozes out like a runny nose.
"oh man i runny nosed my girl last night, and it got all over her face."
by poopy squirepants June 18, 2006